Adjustable cutting-knife



W. F. MORSE. v ADJUSABLE CUTTING KNIFE.- APPLlcATmN Frigo sanza, 1917.

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Patented Aug. 31, 1920.4

NETE STATES FATENT WILLIAM F. MORSE, OF ROCHESTER, NEW YORK, ASSGNOIR TO SAMUEL'R. PARRY 0F ROCHESTER, NEW y ADJUSTABLE CUTTNG-KNIFE Specification of Letters Patent.

Patented Aug'. 31, 19219.

Application filed September 29, 1917. Serial No. 193,981.

To @ZZ fau/01a it may cof/tecra:

e it known that l, lifiLLIAM F. MORSE, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful improvements in Adjustable Cuttinglnives, of which the following is a specification.

The object of this invention is to provide a new and improved` adjustable cutting knife and die for cutting corners and miters in making blanks in the box making trade.

These and other objects of the invention will be fully illustrated in the drawings described in the speciicationand pointed out in the claims at the end thereof.

1n the dra-wings,

Figure 1 is a perspective view of the cutting knife and die spaced apart.

Fig. 2 is a top plan view of the die.

ln the several figures of the drawings like reference numerals indicate like parts.

The cutting knife and die which consti tutes the invention of this appiication is intended for use in connection with the machine for cutting box forms shown in my Patent No. 891,359 in which patent a ma chine is shown provided with a reciprocating ram to which is attached a head having a plurality of cutters thereon that can be adjustably spaced apart for the purpose of cutting box blanks of different dimensions with the same cutters.

In the drawings, reference numeral 1 indicates the knife holder that moves up and down with the ram of the press. On this holder is fastened a knife which in this case is shown in four pieces 2, 3, f1 and 5 respectively. rl`he knife or cutting bar 2 is provided with the V-shaped angular projections or angle cutters G and 7 which are made for the purpose of cutting bevels o r miters or notches in the box blank. Sup- ].ilemcnting the knife 2 are the knives 3 and 4L which are faced by the knife 5 which makes an angle therewith and which may be of any desired length.

This knife coperaties with the die which consists of a block 8 having the pieces or cutting bars 9, 10 and 11 thereon. The cut ting bar 9 has the recess 12 cut therein which coperates with angle cutter 6.

Between the cutting bars 9 and 10 is formed a recess 13 which cooperates with the angle cutter 7. Adjacent to the cutting bar 10 is placed the cutting bar 11 which is offset therefrom and coperates with the knife 5. j f

In the corner cutters heretofore made considerable trouble has been experienced in sharpening the knives and cutting bars and .keeping them in adjustment and maintaining' their original form so that they will cut identically the same blank after successive sharpenings.

To provide for the sharpening and adj ustment of the cutter7 l make it in the four pieces 2., 4 and 5. l make the knife 2 in one piece and sharpen it on the faces 14, 15 and 16. With each sharpening this will change the distance between the edge of the critter 7 and the corner which the face 16 makes with the angle cutter; 6 but this is compensated for by grinding back the angle cutter 6 until this dimension is restored.

The cutter 3 is also ground so that its cutting face will be kept true withthe cutting face 14C. The critter' 5 is ground on the faces 16 and 17 and to keep the distance correct between the face 16 and the angle between the faces 111 and 15, the cutter 5 is made adjustable lengthwise by providing the slots 18 and 19 through which the screws 2O and 21 pass which clamp it in place on the knife holder.

In this way all the cutting edges of the cutter can be ground and adjusted with reference to each other to take up the wear and preserve accurately their relative positions.

in the die provision is also made for taking up the wear caused by the grinding of the cutting edges. For this purpose this die is made in three pieces 9, 10 and 11 as above pointed out, each having a cutting edge or edges thereon. Then the piece 9 is ground through its whole length and clamped in place on the die block, it wiil hold the recess 12 forward of its true position and this is corrected by grinding out the recess to its original depth. rlhe piece 11 when ground will normally be short of its correct position and to permit of its adjustment forward into its correct positionE l provide the elongated slots 22 and 23 through which the screws 211- and 25 pass by which it is clamped to the block. In this way the cutting edges 9 and 11 are held in correct alinement.

When the piece 10 is sharpened it must be sharpened. on three faces 26, 27 and 2S and the effect of each sharpening will be to Y original length.

decrease the width et the cutting bar and the width or the cut made thereby. To cornpensate for this the base or" the cutter is made in the form of a trapezoid in which the side or tace 29 is at a small angle to the side 26 and not parallel thereto. The cutting bar 9 is recessed or cut away at an angle to Correspond to term aV seat i'or the side 29 of the cutting bar 10. After each grinding, the cutting bar will be set forward diagonally, along the line ot the side 29 and an increased thickness oic the cutting block 10 will be exposed which will be suilicient to compensate ior the loss due to grinding.

lt will be noticed that the angle ot the side of tace 29 is less than the angle of the face 28; 1With each grinding ot the block 1G the tace 29 will be shortened as the stock is ground away to restore the tace 28 to its The difference in the angle ot the two faces, makes possible the grinding et the block and its adjustment with relation to the other cutters and this l consi der an important 'feature of my invention. l proier to rnake the angle ot the side 29 about 'halt of the angle that is given to the side or cutting iace 28. is the side 2T is ground the block 10 will be set forward and thel cutting taces 28 and 26 will be ground to correspond and the relative position of the cutting edges will thereby be kept the same. The block lO'is held in place by the screw 30 which works in a slot 31 which slot is parallel to the side 29, by which the adjustment of the block is provided tor.

l claim: l. A. cutting die formed ot two cutting barsplaced one at the side of the other and having an acute Yangular recess between them, one ot said cutting bars having an oblique 'seat on the other cutting bar along which it can be adjusted to take up wear and grinding and preserve the outline of the original cutting edge.

Q.. A cutting die formed oi' two cutting bars placed one at theside ot' the other and having an acute angular recess between them, one of said cutting bars having anV oblique seat on the other cutting bar along which it can be adjusted to take up wear and grinding and preserve the outline of the original cutting edge, the angle ot said oblique sea-t being less than the angle ot said recess. Y j

3. fr cutting die for cutting box blanks formed oi' two cutting bars placed one at the side of the other and having an acute angular recess between them, one ot said cutting bars having the shape of aright angled trapezoid, the upper end o'll the inclined side o't which being cut away at a greater angle to form a cutting edge, an

oblique seat in the other cutting bar along which the lower end ot the inclined side V-issiaia oi said trapezoid is adjustable to takeup wear. j

4f. A cutting die for cutting angles in box making blanks, said die having a cutting bar with an angular recess therein, a second cutting bar having one side engaging in,

said recess and projecting beyond said recess and forming an angle with the straight edge oit' said cutting bar, said second cutting bar being adjustable along said angular G. A die for cutting angles in bof; blanks,

said die having two parts, one oi' said parts being adjustable toi-ward and laterally oit the other part and keeping contact therewith, said adjustment serving to compensate tor the wear causer. by use and grinding and keeping the saine outline and dimensions in the cutting edge of said die. j

7. 151 cutting bar. having th'e shape of a right angled trapezoid, the inclined side thereof being cut back at the top to form an angular cutting edge, an inclined seat on which the lower end of' said inclined side is adjustable to take up the wear 'of the inclined cutting edge. Y

8. fr cutting bar tor a cutting die having five sides two of which are adjacent to and nearly in line with each other, one of said two sides forming a cutting edge to` the other of said two sides, marking the line of adjustment to compensate for the wear on thev cutting edge.

9. i cutting bar tor cutting il-shaped angular recesses in box blanks, said cutting bar having a side cutting bar having a V- shaped angular projection thereon and a trent cutting bar at the side thereof, said side` cutting bar being adjustable forward to compensate for the wear caused by use and grinding` and preserve the outline of the original cutting edge.

l0. A cutting device for cutting box blanks with vf-shaped angular recesses therein, said device comprising a side cutting bar having a if-shaped angular lprojection thereon, front cutting bar at the side thereof tor cutting a square corner, said Viront cutting bar being made up ot two cutting blades, one placed to overlap the other and l part being adjustlio form a cuttingang-le between them, the one blade being adjustable on the other atthe angle. j

lntestimony whereot l afiiX my signature.

WILLIAM Ffh/10KSB 

